Deep-well pump



Patented Dec. 8, 1936 UNITED STATES PATENT OFFICE ton, Ohio, assignors t Dayton, Ohio, a corpor o The Duro ation of Ohio Company,

Original application January 5, 1935, Serial No.

478. Divided and this a Serial No. 32,770

pplication July 23, 1935,

2 Claims. (Cl. 308-4) Our invention relates to deep-well pumps.

It is our object to provide a pump that, instead of ranging from 35 to 65 R. P. M., or strokes per minute, can be safely run up to well over strokes per minute, and under some conditions, to as high as strokes per minute, thereby providing a very fast, high-capacity deep-well pump.

It is our object to provide a pump having an air chamber at the top of the drop pipe between the differential cylinder and the power head casing supporting the drop pipe, which is supplied with air; and which chamber has an outlet for air and water at a point below the bottom of the difi'erential cylinder.

It is the object of our invention to provide in a deep-well cylinder, between the top valve and plunger assemblage and the foot valve assemblage, an air duct in which the air will cushion an impact caused by the plunger descending against the water.

It is the object of our invention to provide means to supply air to this air chamber and duct by an air pump on the base of the pump.

It is a further object to provide a hollow differential rod and hollow sucker rod through which air is supplied by the air pump to the air duct so that the excess of air will rise with the water.

It is an object to provide that a part of this air will be expelled at the discharge opening to form an air cushion around the difierential cylinder, and the other part will be delivered to the pressure tank where the air volume control will allow the excess of air to escape from the pressure tank.

It is a further object to provide, in a modifled form, an air duct directly above the valve and plunger assemblage.

It is an object to provide for an air chamber on top of the plunger acting as an air cushion for the entire column of Water, both on the up and down stroke, so that there is an air cushion to cushion any impact resulting from the movement of the column of water.

It is a further object to weight sucker rod which is hollow.

It is an object to provide a sucker rod having resilient guiding members mo'unted on the red at intervals, and connecting members for the rod sections on which the resilient members are mounted.

This application is a division of our copending application, Ser. No. 478, filed January 5, 1935.

Referring to the drawings:

reciprocating type,

provide a very light- Figure 1 is an elevation, partially in section, through the air pump, diiferential cylinder and the pump base.

Figure 2 is a section through the casing, drop pipe and bottom cylinder. 5 Figure 3 is a section through the sucker rod guide mechanism, using springs as a substitute for the rubber members of Figure 2.

Figure 4 is a section on the line l4 of Figure 3, looking in the direction of the arrows. 10

Figure 5 is a section through a modified form of the power head and sucker rod, air pump, differential cylinder and the upper ends of the drop pipe and the casing.

Figure 6 is a section through the drop pipe 15 casing and sucker rod and the main cylinder at the bottom of the drop pipe.

Figure 7 is a similar view showing a modified form of cylinder.

Figure 8 is a section on the line 88, looking in the direction of the arrows, on Figure 6, showing one form of rubber guide member on the sucker rod.

Figure 9 is a similar section, showing a modified form. 25 Figure 10 is a similar section, showing another modified form.

Figure 11 is a bottom plan View of Figure 7, looking in the direction of the arrows, on the line Referring to the drawings in detail, I desig- 3O nates an electric driving motor which drives through the belt 2 and pulley 3, mounted on the crankshaft 4. The crankshaft is connected to the pitman in any desired manner, which forms 35 no part of the present invention, and this pitman, in turn, is guided by the crosshead 5 operating in the crosshead guide 6. The difi'erential piston rod 1 is connected to the crosshead 5. It passes through the packing 8, designated the differential seal. The difierential piston rod carries the differential piston 9 operating in the diiferential cylinder [0.

It will be noted that this cylinder is spaced from the walls of the cylinder l l, which constitutes an 5 air chamber for receiving .the air that enters through the air passageway l2 from the pipe I3 at the base of the air pump cylinder l4. Communication between the space above the air cylinder I 4 and the pipe I3 is controlled by the air 50 pump valve I5. It is normally held seated by the spring IS. The air pump piston l1 operating in the cylinder I4 is provided with a leather packing member l8. This piston is carried on the air piston rod l9, which in turn, is supported by 55 2| of the base 22 of the power head, is

the air pump arm mounted on the differential rod 1 and traveling with it.

The differential cylinder I0, which is mounted upon and depends from the removable cover plate so arranged that it terminates above the water and air port 23 of the passageway 24, which leads past the valve 25 to the tank 26. The top of the differential cylinder just beneath the differential seal 8 is provided with a port 21 communicating by the drainage pipe 28, having the port 29, leading into the space between the casings and 3| outside the air chamber l'|.

' The bottom of the cylinder carries the drop pipe 10. Spaced from this isthe casing 3|. Depending from the diflerential piston 8 is the sucker rod 32. This-rod is made in a plurality of sections that are joined together by a con-' be of any desired necting collar 33 which may character. These collars of rubber may be of any desired shape. They may be provided with a smooth exterior, as in Figure 10, or may have a plurality of projections, as shown in Figures 8 and 9. The rubber collars may be mounted directly upon the sucker rod at any point, or more conveniently, at the juncture points of the sections of the rod. We prefer to attach the rubber guide to the coupling.

The bottom of the sucker rod is connected to the cage 35 of the plunger valve assemblage. Within this cage is carried a spring 36, tending to seat the valve member 31 to close the port 38 in the hollow piston 39. This piston has cup leathers 40 engaging the inside of the side walls of the deep well cylinder 4|. This cylinder is provided with a stationary bottom cage 42, spring 43 and valve member 44 closing the port 45, which seals the access to the interior of the cylinder 4| from the casing.

As will be seen in Figures 3 and 4, an alternative form of guide member may be employed, consisting of a rubber cushion member 46, a sleeve 41 and springs 48 carried as clips on the side of the sleeve 41. The dotted lines indicate to what extent the springs are compressed when they are placed within the drop pipe. These guides comprising the spring clips are placed on the sucker rod and forced into the drop pipe with the sucker rod. It will be understood that the suckerrod couplings may be made in one or a plurality of pieces, and of any desired form.

The operation of the construction shown in Figures 1 and 2 is such that the water discharge port 23 is placed below the bottom end of the differential cylinder, thus forming an air chamber around the differential cylinder. Air is supplied by the air pump, thereby maintaining an air cushion. The excess of air is delivered to the pressure tank, where an air volume control will release the excess air. This volume control is designated 49 and may be of any desired character As the differential rod reciprocates, the air is pumped in through the air pump l4, valve l5, passageway l3 and passageway |2 into the air chamber between the differential cylinder in and the cylinder II. This forms an air cushion within the bottom of the differential cylinder and around it. The exit pipe 24 has a port 23 appreciably below the bottom of the differential cylinder l0. In this manner the air chamber is preserved around the diiferential cylinder Ill. v

Thewater is taken in at the bottom of the drop pipe through the port upon the lifting of the valve 44, due to the upward movement of the works within piston 39. On the downward movement of the piston 39, the valve 44 is closed and the valve member 31 is lifted, thus permitting the water in the cylinder 4| making its exit to a point above the piston ,39. .The action of the piston 18 moves the water up through the drop pipe and around the rubber guides, and thence through the port 23 and passageway 24 to the tank 28, as heretofore described. 7

Turning to the modified form in Figures 5, 6, and 7, the differential rod 1 terminates in a screw head 50. This head is screwed into a T-fitting 5| One side of this hollow T-fltting is provided with a pipe 52, constituting the air pump arm. The free end of this arm is provided with a depending hollow air pump rod 53 which carries on the bottom of it an air pump piston 54 and within the bottom of it a ball air pump valve 55 yieldingly held in position by thespring 56. The piston 54 the air pump cylinder 51. This cyllnder is closed at the bottom by the cap 58. The cap 58 is mounted upon the base 22 of the power head of the pump.

Air for the air pump is admitted during the up stroke around the packing of the piston E4, the ball valve 55 being held in a closed position by its spring 56. This air is trapped in the cylinder 51 below the piston 54-on the down stroke thereof. This air lifts the valve against the spring 59 and passes through pipes 52 and 52, and thence through the hollow differential piston rod 60, which is connected at one end to the fitting 5| and at the other end to the differential piston 8. The differential piston, in turn, is connected through the coupling 6|, which is hollow, to the hollow sucker rod 62, which is formed in sections and connected together by any desired form of coupling, such as the hollow coupling 63 that carries the rubber guides 34.

The bottom of the droppipe 30 is provided with a deep well cylinder 4|, as heretofore described. On the bottom of the hollow drop pipe 62 and surrounding the bottom of the pipe is a venting the passage of air through the ports 65 in the piston 66. This piston is sealed by the packing ring 61 to the inner wall of the deep well cylinder. The piston also carries an air duct 68 that depends therefrom, but is spaced from the inner walls of the deep well cylinder 4|. The bottom of this air duct 68 is provided with a closure 69 having a plurality of ports I0. The bottom of the deep well cylinder is provided with a usual check valve 44 held in position by the spring 43 controlling the port 45.

The modification shown in Figure '7 consists of the fitting H, being mounted on the hollow sucker rod 82. This fitting has a right-angular passageway 12 communicating with the interior of the air cylinder 68. The bottom of this fitting Il carries the rod 13 that extends beyond the bottom of the air cylinder 68 and terminates in the piston 66. This piston is provided with a valve member 64 and is spring-pressed over the ports 85. In this modification the air duct 68 is above the piston, whereas in the previous form the air duct was below the piston.

In a deep well cylinder we have therefore provided an air duct between the top valve and Ierential rod and hollow sucker rod. Any excess of air rises with the water. Part of this air is expelled at the discharge opening to form an air cushion around the diflerential cylinder, and the other part is delivered to the pressure tank, where the air volume control allows the excess of air to escape from the pressure tank.

In the last-mentioned modification, the air chamber is directly above the valve and plunger assemblage. The air is likewise supplied by the air pump having the same air cushion in the differential cylinder and with the same air volume control in the tank. As the air chamber is on top of the plunger it acts as an air cushion for the entire column of water, both on the up and down strokes.

It will be understood that we desire to comprehend within our invention such modifications as come within the scope of the claims and the invention.

Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent, is:

1. Guide means adapted to be mounted on a sucker rod and adapted to yieldingly engage the walls of a surrounding drop pipe whenthe sucker rod is deflected, said guiding means comprising a rubber cushion sleeve surrounded by a metal sleeve having axially disposed and annularly spaced thereon a plurality of metal strips having their ends formed into re-entrant loops outwardly disposed from the sleeve to resiliently engage the walls of the drop pipe when the sucker rod is deflected therein.

2. Means for guiding a pump rod in a drop pipe comprising a resilient cushion sleeve adapted to be supported on said pump rod, a metal sleeve supported on said cushion sleeve, and a plurality of axially disposed metal strips annularly spaced on said metal sleeve, said strips having their ends formed into re-entrant loops adapted to engage the walls of the drop pipe and resiliently space the pump rod from said walls.

ARTHUR C. ZIMMERMAN. ELMER F. STEGER. 

